[Solved] What will be the effect of this command?docker service update --image myapp:v3 --update-parallelism 1 --update-delay 10s myservice | Docker

Docker - Swarm

What will be the effect of this command?

docker service update --image myapp:v3 --update-parallelism 1 --update-delay 10s myservice

AUpdates one container at a time with 10 seconds delay between updates

BUpdates all containers simultaneously after 10 seconds delay

CUpdates containers in batches of 10 with 1 second delay

DFails because --update-delay cannot be combined with --update-parallelism

Step-by-Step Solution

Solution:

Step 1: Understand --update-parallelism and --update-delay
--update-parallelism 1 means update one container at a time; --update-delay 10s adds 10 seconds wait between updates.
Step 2: Analyze command effect
The command updates containers one by one, waiting 10 seconds between each update.
Final Answer:
Updates one container at a time with 10 seconds delay between updates -> Option A
Quick Check:
Update one at a time + delay = Updates one container at a time with 10 seconds delay between updates [OK]

Quick Trick: Use --update-delay to pause between container updates [OK]

Common Mistakes:

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What will be the effect of this command?